You will need to get a bit deeper into the device, checking the voltages at
the Eprom and MPU to determine if the Data or Clock lines are being loaded
down. Will definately need a good schematic of the circuit to start tracing
the associated lines to the other probable devices.
"Dani" wrote in message
ups.com...
Model # 27R430T (YX1), Chassis # ITC008FAR, dead, nothing shorted, or
leaky, all standby voltages are ok, plug unit in, & just relay click
for degaussing. No start up, or High Voltage.
Could the tact switches be leaky? It has a front panel board with the
IR sensor, & the tact switches on it. Dani.